Method and system for controlling traffic over a computer network

a computer network and traffic control technology, applied in data switching networks, frequency-division multiplexes, high-level techniques, etc., can solve the problem of selective placement of limits, and achieve the effect of not negatively affecting the performance of the host device, high throughput, and short tim

Active Publication Date: 2010-05-27
AVAGO TECH INT SALES PTE LTD
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  • Abstract
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Benefits of technology

[0009]The use of separate rate limiter engines and profile tables with individualized allocations for each flow, virtual machine, and blade server provides an important advantage in the architecture of the ASIC, in that software or firmware can separately set the allocations. In one embodiment, a processor is only used to set initial allocations for the virtual machines, flows, and blade servers. All other operations of the rate limiter are performed by hardware. As such, the verification can be done in a short amount of time and does not negatively affect the performance of the host device.
[0010]In addition, the rate limiting features provided by embodiments o

Problems solved by technology

In other words, limitations may be selectively placed, through software or firmware, on traffic for particul

Method used

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  • Method and system for controlling traffic over a computer network
  • Method and system for controlling traffic over a computer network
  • Method and system for controlling traffic over a computer network

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Embodiment Construction

[0020]In the following description of preferred embodiments, reference is made to the accompanying drawings which form a part hereof, and in which it is shown by way of illustration specific embodiments in which the invention can be practiced. It is to be understood that other embodiments can be used and structural changes can be made without departing from the scope of the embodiments of this invention.

[0021]Although the idea of rate limiting packets issuing from a network port in response to congestion notification messages (e.g., BCN—backwards congestion notification) is well known, embodiments of the present invention disclose a distinct hardware-based rate limiter that can react to a BCN by loading (from firmware or software) rate allocations into profile table entries of registers in an application-specific integrated circuit (ASIC). The profile tables may also include entries loaded from hardware reflecting the current traffic rate in the network. The rate limiter may be embe...

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Abstract

A rate limiter incorporated in a server connected to a network. The rate limiter is adapted to reduce congestion in the network in response to a congestion notification message. The server is adapted to send packets over the network. The rate limiter includes at least one of: a server rate limiter engine adapted to rate limit the packets in response to the server; a virtual machine rate limiter engine adapted to rate limit the packets in response to a virtual machine associated with the packets, the virtual machine hosted by the server; a flow rate limiter engine adapted to rate limit the packets in response to a flow associated with the packets; the flow being one of a plurality of flows transporting packets over the network; and a transmit engine adapted to rate limit the packets in response to a virtual pipe of the network for transmitting the packets.

Description

FIELD OF THE INVENTION[0001]This invention relates generally to traffic control in a computer network, and more specifically to rate limiting in response to congestion in the network.BACKGROUND OF THE INVENTION[0002]Network congestion can occur when too much data is sent through a particular link or node of a network. Such congestion may negatively affect the quality of service provided by the network. For example, it may cause queuing delays, packet losses, and blocked connections. Therefore, it is desirable to make sure that the amount of traffic passing through each node of the network does not exceed what the node can handle.[0003]A typical scenario of network congestion is illustrated in FIG. 1. As illustrated, the network includes two servers A and B 100, 102, a switch 104, and two disks T1 and T2108, 110. The number of devices shown in FIG. 1 is limited for illustration purposes only. Additional servers, switches, disks, and other types of devices may be connected to the netw...

Claims

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Application Information

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IPC IPC(8): H04L12/24
CPCH04L47/10H04L47/11Y02B60/31H04L47/263H04L47/2483Y02D30/50
Inventor CHAVAN, MUKUND T.BHIDE, PARAGTUMULURI, CHAITANYASHENOY, RAVINDRA SADANAND
Owner AVAGO TECH INT SALES PTE LTD
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